Abstract
A study has been made of two techniques, chill casting and consumable arc melting, for preparing ingots of Cu-Nb alloy for production of multifilamentary Nb3Sn superconducting wire. It was found that Y2O3, ThO2 and graphite all make excellent crucible materials for melting Cu-Nb alloys at 1850° C. Some difficulty was found with Nb segregation in chill-cast 5 cm diameter ingots. The consumable arc casting technique was shown to produce a uniform Nb dendrite distribution with little macrosegregation in 5 cm diameter castings and is regarded as having excellent potential for scale-up production of uniform Cu-Nb ingots of 25 to 30 cm diameter.
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Verhoeven, J.D., Gibson, E.D., Schmidt, F.A. et al. Preparation of Cu-Nb alloys for multifilamentaryin situ superconducting wire. J Mater Sci 15, 1449–1455 (1980). https://doi.org/10.1007/BF00752124
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DOI: https://doi.org/10.1007/BF00752124